github.com/weaviate/weaviate@v1.24.6/adapters/repos/classifications/repo.go (about)

     1  //                           _       _
     2  // __      _____  __ ___   ___  __ _| |_ ___
     3  // \ \ /\ / / _ \/ _` \ \ / / |/ _` | __/ _ \
     4  //  \ V  V /  __/ (_| |\ V /| | (_| | ||  __/
     5  //   \_/\_/ \___|\__,_| \_/ |_|\__,_|\__\___|
     6  //
     7  //  Copyright © 2016 - 2024 Weaviate B.V. All rights reserved.
     8  //
     9  //  CONTACT: hello@weaviate.io
    10  //
    11  
    12  package classifications
    13  
    14  import (
    15  	"context"
    16  	"encoding/json"
    17  	"fmt"
    18  	"os"
    19  
    20  	"github.com/go-openapi/strfmt"
    21  	"github.com/pkg/errors"
    22  	"github.com/sirupsen/logrus"
    23  	"github.com/weaviate/weaviate/adapters/repos/db/helpers"
    24  	"github.com/weaviate/weaviate/entities/models"
    25  	"github.com/weaviate/weaviate/usecases/classification"
    26  	bolt "go.etcd.io/bbolt"
    27  )
    28  
    29  var classificationsBucket = []byte("classifications")
    30  
    31  type Repo struct {
    32  	logger  logrus.FieldLogger
    33  	baseDir string
    34  	db      *bolt.DB
    35  }
    36  
    37  func NewRepo(baseDir string, logger logrus.FieldLogger) (*Repo, error) {
    38  	r := &Repo{
    39  		baseDir: baseDir,
    40  		logger:  logger,
    41  	}
    42  
    43  	err := r.init()
    44  	return r, err
    45  }
    46  
    47  func (r *Repo) DBPath() string {
    48  	return fmt.Sprintf("%s/classifications.db", r.baseDir)
    49  }
    50  
    51  func (r *Repo) keyFromID(id strfmt.UUID) []byte {
    52  	return []byte(id)
    53  }
    54  
    55  func (r *Repo) init() error {
    56  	if err := os.MkdirAll(r.baseDir, 0o777); err != nil {
    57  		return errors.Wrapf(err, "create root path directory at %s", r.baseDir)
    58  	}
    59  
    60  	boltdb, err := bolt.Open(r.DBPath(), 0o600, nil)
    61  	if err != nil {
    62  		return errors.Wrapf(err, "open bolt at %s", r.DBPath())
    63  	}
    64  
    65  	err = boltdb.Update(func(tx *bolt.Tx) error {
    66  		if _, err := tx.CreateBucketIfNotExists(classificationsBucket); err != nil {
    67  			return errors.Wrapf(err, "create classifications bucket '%s'",
    68  				string(helpers.ObjectsBucket))
    69  		}
    70  		return nil
    71  	})
    72  	if err != nil {
    73  		return errors.Wrapf(err, "create bolt buckets")
    74  	}
    75  
    76  	r.db = boltdb
    77  
    78  	return nil
    79  }
    80  
    81  func (r *Repo) Put(ctx context.Context, classification models.Classification) error {
    82  	classificationJSON, err := json.Marshal(classification)
    83  	if err != nil {
    84  		return errors.Wrap(err, "marshal classification to JSON")
    85  	}
    86  
    87  	return r.db.Update(func(tx *bolt.Tx) error {
    88  		b := tx.Bucket(classificationsBucket)
    89  		return b.Put(r.keyFromID(classification.ID), classificationJSON)
    90  	})
    91  }
    92  
    93  func (r *Repo) Get(ctx context.Context, id strfmt.UUID) (*models.Classification, error) {
    94  	var classificationJSON []byte
    95  	r.db.View(func(tx *bolt.Tx) error {
    96  		b := tx.Bucket(classificationsBucket)
    97  		classificationJSON = b.Get(r.keyFromID(id))
    98  		return nil
    99  	})
   100  
   101  	if len(classificationJSON) == 0 {
   102  		return nil, nil
   103  	}
   104  
   105  	var c models.Classification
   106  	err := json.Unmarshal(classificationJSON, &c)
   107  	if err != nil {
   108  		return nil, errors.Wrapf(err, "parse classification from JSON")
   109  	}
   110  
   111  	return &c, nil
   112  }
   113  
   114  var _ = classification.Repo(&Repo{})